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| Patents Granted on 1816-04-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,581X | Apr. 30, 1816 | J. Ewing | Churn | churns | |
| 2,582X | Apr. 30, 1816 | D. Beard | Fur cutting machine | ||
| 2,583X | Apr. 30, 1816 | J.H. Derby | Stamping engravings on horn and turtle shell | ||
| 2,584X | Apr. 30, 1816 | W. Price | Composition of glass | ||